Walmart offers the Ameriwood SystemBuild 54" Wall Cabinet in White for $68.58. Opt for in-store pickup to drop that to $66.04. (Amazon has it for the same.) That's $5 under yesterday's mention and the lowest price we've seen. (It's the best deal now by $30.) It features three adjustable shelves and measures approximately 12" x 54" x 20".

Update: Walmart's price after the in-store pickup discount has dropped to $61.25. Amazon is charging the same.